Thread waxing device



Sept. 2, 1952 R. L. BIXQADLEY THREAD WAXING DEVICE Filed June 9, 1950 Inventor Robert L. Bradley By his Attgmey Patented Sept. 2, 1952 7 UNITED V STATES PATENT OFFICE I THREAD WAXING' nEvIoii Robert LaBradley, Beverly, Mas 5., assignorto United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application June 9, 1950, Serial No. 167,134

The present invention relates to thread waxing devices for usewith shoe sewing and thread winding machines and to improvements in strippers forwaxing devices of the type disclosed in United States Letters Patent No. 1,015,772, granted Janua'ry 30, 1912, upon application of Fred Ashworth, and in an application for United States Letters Patent Serial No. 86,349, filed April 8, 1949, now Patent No. 2,576,961, granted December 4, 1951, in the name of John F. McCarthy. I h t V The stripper of the McCarthypatent is an improvement over that disclosed in the Ashworth patent and the improvement contributes substantially to the durability and ease in adjustment of the Ashworthstripper. It has been found, however, that in certain instances, particularly in starting a sewing or winding machine in operation, that small chunks of incompletely liquefied wax or solid particles of foreign materials may momentarily impede the thread in its passage through the stripper, such chunks or particles being carried along with 'the thread to the injury or excessive'wear of the stripper. The stripper of the McCarthy patent comprises primarily a compressible'perforated rubber plug through which the thread is drawn and in case chunks or particles of solid material are drawn into the perforation of the plug and become wedged therein;

they may cause faulty stripping action on the thread. i

It is an' object of the present invention to reduce to a minimum the likelihood of injury to a wax stripper of a sewing or winding machine employing a compressible plug as the stripping element, with a view to increasing the durability of the stripping element and reducing the possibility of improper stripping action or injury to the thread acted upon, either momentarily orpermanently from the presence of chunks, or particles of solid material, passing into the plug with the thread. Other objects of the invention are to improve the construction and simplify still further the effectiveness of adjustments during use of a wax thread stripper.

In accordance with these objects, a thread waxing device has been provided having a compressible perforated wax stripper plug, which is equipped with a prestripper for the thread located along the length of the thread at a point just before it enters the stripper plug, comprising a refractory bead formed with a loose fitting 2 Claims. (01. 118-125)] 2 carried into the compressible plug with the thread. The admission of a knot in the thread is highly desirable in theoperation of a stripper plug in changing from one type of thread to another where different types of sewing work areto be performed or where wound packages of differently colored threads are to be prepared on the same winding machine.

.These and other features of the invention as hereinafter described and claimed will readily be understood from the following. detailed descriptiontaken in connection with the accompanying drawings in which, i

Fig. 1 is a sectional view on'an enlarged scale of a-waxing device and an upper portion of a cover for a wax pot embodying the features of the present invention, and

Fig. 2 is asimilar view on a further enlarged scale of a protecting bead and its mounting through which thread passes to a stripper for the waxing device.

The illustrated thread waxing device is intended for use in connection with a wax pot, the cover portion of which is indicated at 4, through which a thread 6 passes in the direction of the arrows in Fig. 1. .The thread enters a tube 8 in the wax pot cover and after being submerged within a bath of liquid wax, either in a molten or emulsified state, the thread is drawn through a perfo-- has a perforated Wall at its lower end into which the thread enters. The ends of the plug [0 are formed with conical surfaces having substantially different conical angles, the end of the largest angle being at the bottom where. the thread enters. In other respects the construction of the thread waxing stripper is (similar to that disclosed in the McCarthy patent.

In order to protect the internal surfaces of the perforated rubber stripper plug H) from injury due to the passage of particles of solid'material along with the thread into theplug, it has been proposed to employ a refractory bead having an opening in line with the perforation of the plug at that end of the plug into which the thread enters. The use of such bead, however, if it fits closely with the thread is objectionable when an attempt is made to rethread the waxing device through the common expedient of tying a knot between the end of the old thread supply and that of a new supply of thread. To require an operator to rethread the waxing device with a rethreading wire and manual insertion of the thread involves a. highly disagreeable.andtedious task which more than; offsets the desirability of improving the durability of the stripper plug itself.

According to the present invention, by the use of a properly selected refractory beadith'edi'mculties encountered in rethreading a waxing device. of the type referred to have been'sovercome and substantial benefits have resulteduinmtheuditection of increasin the durability of the stripper plug. Accordingly, the lower thread entering end of the socket I4 is counterbored at ,20 in line with the perforated end wall of the sleeve I 2 and inserted within the counterbore is a refractory bead 22havinga loose-fitting opening'ldfor-the thread also'in'linewith the perforation in the plug andof a size approximately three" times-the compressed diameter of the-thread. The-pur=' pose of the loose "fitting opening is to admit" passageof a knot in the thread-when rethreading the waxing device. Such a'knot is indicated'at 26 (Fig. 2) joining the endsof'anoldsupplyof thread; unshaded toindicate white threadiand a'new'supply, shaded to indicate coloredthread. The opening '24is ofsuch sizeas will pass'the'knoti 26 when the 'knot is tightened into a compressed condition, the knot having a close'fit 'Withinthe opening; A secondary advantage of the bea'd'in the prescribedsize of opening'is that there is n'o' danger'of loosening the .knot from frictional en gagement with the surfaces insidethe passage of the stripper'plug I 0, once having passed'the bead. The large size of openingiirr the'bead' as come pared with the compressed diameter'ofthethreadi has been found to be not withoutsomesub'stanmar benefit in improving the durabilityfiof the strippenplug, and in actual use "stripper-plugs have lasted several times longer'with a' beadlsd located and constructed than without such bead:

The exact reason for improvement'in durability of the life ofa' stripper plug when used-with" a bead of loose fittingopening is not clearly understood but suchbead appearsto contribute -to-thedurability of "the-plu'g'in several particulars: The head being of" refractory material serves" to obstruct and'break up particles of solid wax'or foreign materials before-they can enter the inner surfaces ofrthe passage -inthe plug and'thehead I protects the plug from application of excessive" Dressuresin the wax when the threa'dis drawnthrough rapidly" with wax inviscous or semimelted condition. In: this respect a more uni form: application ofwax is made. Additional benefits froin the beadare derived fromthe fact" that no outlet exists between the bead and the thread-"entering endof the plug so that any'pressurewhich is built up inside the thread entering endiof the plug serves to impregnate thethread' passing therethrough more-deeply than otherwise would be possible.

The construction and arrangement ofthe bead 22in-the counterbore 20 2s such-that it is securely heldin place closeto the perforated lower end ofeithe stripperplug'and may readilybe replaced when asubstantialchange in size of the threadB proper adjustment, a temporary increase in the compression such as occurs during passage of a knot orother obstruction would tend to eject lexcessiquantities- .of: wax from the passage in the plug-so that the knot or other obstruction might pass through more easily when it reaches the thread-entering end of the plug, the compression.of the plug by the bead then being relieved.

The nature and scope of the invention having been indicated and. the particular. embodiment having,beendescribedjwhat is. claimed is:

l: A thread. waxing device having a-stripper sleeveiformed with one end open and a perforated. wall. at the other end into which. the thread. enters, a .socketl ithin which .the sleeve is dis: posed having, a counterbored OpeningMinhne, with the-perforation inth'e end wallcfthe strip. per. sleeve, acompressible perforated wax strip-3- per plug disposed'linthe stripper sleeve ande a; compressor acting at .the open end. of the sleeve onthestripper plugtosecurethe plug and sleeve withinthe ,socket,. in combination with a refrac torybeadiormed with an.opening ,for the thread;.; mounteduins the... counterbore. of s I the. socket. with-2 its opening in. line. with the: perforation! in the. plugandsecuredlin place-withinthe. counterboreof. thesocketclose tothe perforated" end; of the: stripper .plug,

2. 1 A thread I waxing; device? having a; stripper:

sleeveformed with-one'end open-wand a perforated. wall .at the other. end-into: whichrthe thread en-e ters, a socket-within which thesleeve-isdisposed:

having, awcounterbored. opening in line :withthe perforationin the end wall ofthe stripper.sleeve,- a compressibleperforated wax.stripper pluggdis posed. in the stripper. sleeve and a compressoractingatthe open end of the sleeve on thestripr perlplug to secure theplug andsleeve within the.

socket, in combination with a refractory bead slidably mountedin the counterbore of the socket in line with.theperforatediend.wall of. the: sleeve.

and arranged-tube secured in the counterbore-by enga ementwith the perforated. end ofthe sleeve,v said refractory. beadhavin a loose fitting open-- ing for the .threadofasize approximately three:

times the .compresseddiameter of the-threadtoadmit, passage of. a. knot. in the thread whilelimiting the amountof wax carried through the bead into the compressibleplug and to effect thecompression. ofj'the plug against: the compressor" during passageofaknot through the.bead.-

ROBERT L. BRADLEY.

REFERENCES CITED UNITED. STATES PATENTS Name Date Hinsky' Mar: 1, 1936.

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